Gasoline motor



July 1930-y V BRADBERRY 1,768,540

'GASOLINE MOTQR Filed March 11,' 1929 2 sheets-sheet vl i 70 v i l /0 I z l VINVENTOR ATTORNEY July l, 1930.

C. BRADBERRY GASOLINE MOTOR 2 Sheets-sheet 2 Filed March INVENTOR Avronmav l V20 the intake valve tovbe'made comparatively Y -pierof thisinvention. y Y

k.Patented July 1p,

i -d A '1,768,540

-CLAUD IBRADBERRY, OF--CLINTONg KENTUCKY.

GAsoLmn lizro'roit.

Apfn'ication` mea Maren 11N,

' This invention relates to internal. combusf 'tion engines.` It isfan object of 'the invention to provide a novel design of vmotor which combinesthe advantageous' features of. the

5 valve-in-head motorwith. the featuresof the n characters of 4reference are employed to desordinary valve'lin-side motor.

Toward this end, the invention-.contem-f plates the provision of the ordinary cylinderA .block and head. Provision is made whereby Y .he exhaust valves are mounted in the cylinder head directly over the cylinder and these eX- haust valves aresubstantially as large in dianieter as the'diam'eter of the cylinders themselves. The intake valves are mounted in the usual manner in the cylinder block, each valve being mounted adjacent its respective 'j cylinder being operated by a common/shaft in the lower portion of the block.

The provision of the above features permits large without a corresponding weakeningof the valve and cylinder walls. vMeans is provided whereby an instantaneous exhaust'mayy be accomplished by virtue of thefsize of the i i '25 exhaust valves, the `exhaust chamber and the exhaust manifold, the diameter or width,`asN

the case may be of these latter elements beingf substantially the same as the diameter. of the cylinders themselves, and the size of the com-V i i0 bustion chamber maybe greatly Vreduced re-v l sulting in avery high compression.V In ad-f y v y "maintalningthe 4valves ontheir seats.' The y arrangement of the 'intake valves on the side t 1 dition. t'o these advantages the invention contemplates a motor which is extremely compact and which isv strong and durable. Eficiency of operation, comparative inexpense of manufacture and the provision of a minimum number of movableparts are further desir-.n

able features that have been .borne in mind in the production and development ofy this invention.

One embodiment of the invention has been f shown inthe accompanying two sheets, of drawings in which :e Figure l is a top plan view combustion enginein describing the princi- Figure 2 is aside view of the engine, certainparts being broken away to more clearly revealthe nature of the same.

valve seatsOon which the overhead exhaust- 'valves 52 are; disposed. These valves are.

of an internal t 1529. seri'ai No. 346,246;y

` Inall of the abovefmentionedvlewsivilikeif ignate like parts thruout, and the' motor in-l volves in'itsgeneral organization a vcylinder blo'ck 10`having ahead 12'secured thereto jin the usual lmanner by means rof cap screws 14:`

extending thru the head 12 and threaded into Y combustion chamber for thewmixingand eX- ploslon of gases.

*the block 1o. The block 1071s provideydvwah 1 1 a the usualcylinders 15, 16,218 and' 20.l `*The -headfl2`r'ecessed at 22to provide the usual extendingthruvvthecylinder block tocontacty i with valve rodsl 30 slidablyi mounted on a common camshaft 32 geared tothe crank t Ashaft 34 {infany suitable manner.l SparkA l`plugs36 are threaded in the cylinder head 12 above each-valve, and arey ofcourse adapted I *to be in electrical'connectionwitha suitable 1 source of rvrelectrical"energyso 'as tig'nite the ,charge vin theusual manner. Each valve stem V28 has a pin Ll()extending.therethruon g kvwhich pin'there restsa valve platev 12'lxatween which plate and thecylindel-"Qblock"therefisfjy disposed a coil springtfor thepurpose of f ofthe blockis not'noveland no claim is made does the noveltyof theinventionrreside: i

The cylinder head 12 'is providedf withi provided with stems 54 extending' upwardly y Y throu gh 1 the cylinder head. Each'stem'fis; provided'jwith apinv extending'therevthrough which pin serves to; support valve I f plates 58 thereb'eneath andv between which l 1 plate andV cylinder headfjlQ are disposed cfoil-v springs 60' to -Iinaintain` thefvalves' .onf their. A "seats l Supporting rods 62 fare kmounted on ico ' .Itris to be particularly understood that IV ,Y do not desire tobe limited to the exact arrangement ofparts shown in the accompany- V,ing drawings vand described in the present the cylinder head. The vupper ends of these rods are bifurcated at 64.- and pivotally support *rockerA Varms which bear against the valve stems 54 at 68 at one end thereof. The other ends of the rocker arms 66 are provided with collars 68. adjustably mounted on push rod 70 that bear against cam surfaces on the camV shaft 3Q. 1

The intake chamber is shown at 70 and occupies the position in the cylinder blockl below the valves 26.V :The exhaust chamber.

is designated at 72 and this chamber occupies a position in the cylinder head above the valves 52. vThe intake chamber is connected vto the usual intake manifold 'Hand the ex` ',haustchamber 72 is connected to the usual exhaust manifoldft' securedrto the head in any suitable manner.

cylinder The operation ofthe motor can be readily vunderstood from an inspection of Figure 3.' l

.flThe engine. is ofthe ordinary four cycle internal combustion engine and thev cam shaft Y 32 is so arranged that the intake valves 26 will open when the piston is at the top of its gines now in general use is gained, and by this arrangement only can extra large exhaust valves be used, which of course give greater power, speed and efficiency in operation.

lVhat is claimed is An internal combustion engine including 'cylinders' having pistons, intake valves to V'stroke to permitfuel mixturey to be drawnff Y into the cylinders.

- As the piston reaches the bottom of its;

I stroke, this valvewill close so; that on the .fupstroke Vthese l'gases maybe compressed. Y y. AkThe spark plugs are shown at Sand these plugs yare adapted to fire in the cylinder at the pointy of maximum compression. After 'the .power stroke, the exhaust valves open Yand because'these valves are substantially as large, as thebore of thecylinder itself, little i ,or no compressionis offered whenthe gases are being exhausted and consequently com-r Qpressionlosses due to lexhaust Apressure areA l. negligible.

Alhas been: provided which is designed for.

It is obvious then that a motor maximum: power with a minimum of exv pact; inits construction and may be readily disassembled forthe purpose of inspectionA zandrepair.

V platedin the details of construction without haust compression.loss.V Thevdevice is comspecification. Various changes are contemv; .sacrificing of the advantages` contemi Y plated Only in so far as I have particular- Y ly pointed out my invention in the f While `the invention has been shown inconclaim do I desire to be limited.

Mnectionwith the ordinary four cycle, four y' rylinderengine, the` details of'rco'nstruction c tmay be altered'to adapt the principle of the l @prendraiV y inventionto use in a 'motor having six,eight or more vcylinders as desired. f

. .By'thearrangement of the valves as above i describedand shown inthe drawings, it will. :be obvious that the advantage of theextraspace which. the intake valves occupy in en- 

